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08-28-2014, 02:35 PM
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PPU 357 Mag 158gr?
Last edited by Brasky; 01-09-2018 at 07:54 AM.
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08-28-2014, 02:42 PM
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What's the bullet type and weight, plus length of test barrel, if you know?
Last edited by Mike6735; 08-28-2014 at 02:44 PM.
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08-28-2014, 04:18 PM
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Quote:
Originally Posted by Mike6735
What's the bullet type and weight, plus length of test barrel, if you know?
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158gr SJHP
Barrel test length is 254mm which converts to 10 inches
My 686 is a 6"
Here is directly off PPUs site. I converted m/s and J to ft/s and ft/lbs and the numbers match what I posted earlier
0 10 20 30 40 50
Velocity [m/s] 490 477 464 451 439 427
Energy [J] 1129 1164 1101 1042 987 935
Trajectory [cm] -1 -0.3 0.0 -0.1 -0.8 -1.9
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08-28-2014, 05:11 PM
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So if my research is correct, a 10" barrel would have approximately 200-300 more fps than a 6" barrel?
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08-28-2014, 10:15 PM
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This is over my head. Anybody?
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08-28-2014, 10:53 PM
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Just going by memory...
A 158 grain bullet going at 1600 fps is a VERY hot load in a 6" barrel. The 10" barrel would make it possible. I don't think everybody has a Thompson Center Contender, though.
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Last edited by rwsmith; 08-28-2014 at 10:56 PM.
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08-28-2014, 11:16 PM
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Yeah, not going to get 1600 fps out of your 686 with 158s, but they are going to be "stout." Use a two-hand grip
BTW, the increase in velocity with barrel length is not going to be exactly linear, but guessing that 1300 fps is in the ballpark.
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Last edited by Peak53; 08-28-2014 at 11:18 PM.
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08-29-2014, 12:52 AM
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Moderator SWCA Member Absent Comrade
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Prvi Partizan Ammo is made using European CPI standards, not SAAMI standards and us usually a little hotter than the American factory ammo. Their ammo is what ours used to be. I use Fiocchi .32 Auto ammo because it's quite a bit hotter than anything I can buy from an American company. I have no doubt the numbers on their site are accurate.
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09-01-2014, 09:52 PM
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Those numbers might be accurate if a solid test barrel was used. But a realy gun, with taking into account the barrel/cylinder gap, 1350 sounds closer to the truth.
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